The RSPCA. My experience of them happened about 15 years ago, but since then I have heard many similar and worse things about them. We (my family, with my husband driving) were driving home - steadily - along some country lanes when a young rabbit ran out and went under one of the wheels of our car.
Of course, we stopped immediately, and I went back a few steps to check on the rabbit, I fully expected it to be dead, and probably squashed, ɓut I would have still wanted to place it off the road, and onto some land where hopefully any of it's family had a chance to find it and to realise it wasn't coming home again 😟
Anyway, it wasn't dead - unfortunately, as it turns out - but it was making a very stressful sounding noise, and as the poor baby rabbit tried to move away from me, one of his hind legs was just dragging along at a nasty angle. So, I partially covered the rabbit with my fleece, and picked him up as gently as I could, while talking quietly to him in what I hoped was a reassuring sounding voice!
When at home, someone found an empty cardoard box, which we then added a comfy blanket to, and also a towel. I was still holding the rabbit on my knee while it was also gently touching my belly at the same time. I literally felt it's heartbeat slow down, and then stay at a steady beat, while I was still holding him or her.
Sadly, I was pretty bursting for a pee by then, and I also wanted to ring the RSPCA, so after sitting there for a little while longer, in in the almost completely darkened bedroom, I put the whole box down on our bed, and left the room while my husband stayed in there. We had hoped that husband's quiet presence in there would help to keep the cat feeling much more calm, and luckily, that seemed to be the case. S/he didnt open his/her eyes again at that time, but thankfully, his/her breathing and heartrate seemed to have stayed the same throughout my absence.
I had eventually managed to speak to someone on the RSPCA's emergency number, and explained everything that had happened, but even though they told me they had someone cruising around in their emergecy van in my extended area, they refused to come to get the poor little rabbit, and said they would ring up again in a few hours to see how the rabbit was doing. I now know that they expected the rabbit would die very soon, so didn't want to waste any of their own time, or resourses. However, and with the wisdom of hindsight, I now, wish that I had just kept the rabbit quiet and safe until I could take it to our own dog's vet in the morning, and if necessary, either have had the poor thing's broken leg fixed, or have taken to a PDSA facility if there was one within reach. Even if we had eventually had to have the poor rabbit's leg removed by our own vet, or sadly put to sleep, at least I would felt that I could trust the advise given.
Very sadly, I had instead, pointed out to the RSPCA's spokesperson, that the rabbit must be in a great amount of pain, even if it was masking it, and it therefore need some strong painkillers, and an operation on it's leg as soon as posdible. The RSPCA's animal 'medic' eventually turned up with his van, and started speaking very loudly, which immediately made the rabbit start to quietly 'cry' again, and you could easily see that it's heartbeat had started pulsing again! I tried to change my mind at that point, and said we would keep it, but the awful man just grabbed the box of me, and put it in his van, then slammed the door loudly, and drove off... I made several phone calls later, to try to find out how the rabbit was, but nearly everyone at their headquaters denied any knowledge of the rabbit, and of the emergency driver. I eventually found someone who did admit that their 'man' had picked up the rabbit, but he said that the rabbit had died in transit, so never reached them at their hospital! What I expect, is that the RSPCA man stopped the van as soon as we could no longer see it, and that he then just threw the rabbit out onto wasteland..... I still feel sick every time I think about that time.
So since then, having heard and read far too many other horror stories about the RSPCA, I will never knowingly use them again, or advise anyone else to do so either.