I don't let my dogs go near anyone when they are outside. On lead, off lead, it doesn't matter, they don't go near anyone because a) I know that not everyone is a fan of dogs and b) they are staffies and a lot of people are completely misinformed about the breed so I would rather avoid misunderstandings whereby "SMALL CHILD TRIPS OVER DOG THEN IGNORANT PARENT CLAIMS DOG IS A DEVIL DOG AND HAS BITTEN CHILD", which sadly happens because a lot of people are fucking idiots.
OP, YABU. I am allergic to cats but they still come into my garden, AIBU to feel threatened by all cat owners because close contact with a cat (my garden is very small) could set off an allergic reaction and kill me? Aren't the cat owners even more irresponsible than the dog owners considering their cats AREN'T EVEN ON LEADS, roaming the streets waiting to KILL innocent allergy bearers?
In fact I'm actually quite offended by the title of your post. Would it be preferable for you to live in a bubble where no human or animal came near you or your nephew? Should no one else have ANY rights just in case it impedes your convenience?
because you can't tell until the damage has been done, which ones are good (And yes, I do know many of them are very responsible)
How ridiculous. You do realise it is the same with people? You do realise you cannot tell whether people who come into close proximity to your nephew are "good" or will "do damage", don't you? If you want to put it into less sinister terms, what if your nephew had a severe nut allergy and a stranger sitting behind him at the cinema was eating peanuts and breathed their peanut breath all over him, triggering an allergic reaction?
I would advise stepping into reality and taking responsibility for your nephew's allergy instead of blaming every fucker else. You know that he has an allergy, dog owners don't - they may be irresponsible dog owners who let their dogs bound up to children (in my opinion as well) but unfortunately that is something out of your control so instead of making silly statements like "I feel threatened by all dog owners", take him to parks that dog owners are less likely to visit (there are a couple in my town that have dog-free areas) and try not to feel too bitter about it. No, it isn't fair, but few things are.