@youareyou143
Oh plenty of weirdos 
I think the thing is by definition, the people who are MOST active on OD as time goes on tend to be a bit odd?
I mean if you’re normally attractive you’ll meet a few people you get on with quite regularly and mutually want second meets. So unless you’re unemployed with too much time on your hands you’re probably going to step back from OD for a bit.
Then there’s the types who are such weirdos they can’t get any message replies or put others off just by messaging. So you won’t actually meet them IRL.
So the people most active who you’re most likely to meet are the desperate ones who come across as ok so people agree to a first meet but have really weird personality traits/look nothing like their photos. Or those who like attention and are juggling lots of dates.
So OD has a higher rate of players/strange dates than meeting through friends etc.
I haven’t had any complete lunatics recently (been on a break before this year to work on career) but more just a sense of “fucking hell this is depressing?” with some guy who is completely different from his OD profile or a bit awkward/weird?
Many years ago I had someone hiding watching me to check what I looked like before meeting (he came out 
so clearly I passed the test but was really racist and awkward so I left early).
Also there were just the blatantly rude ones - they’re already in the place with their own drink and don’t say anything when you get in just stare (after being all enthusiastic to meet online). Then indicate they want to meet again and it’s like ......WTF????
On a more serious note. Someone , I mentioned earlier who I was briefly in contact with on POF but who I got odd vibes from and who was lying about his job etc? So I cancelled meeting.
I did another random google search for him later on as he kept sending me messages (nothing major I just ignored) and he’d actually been cautioned for harassing an ex (and think about how much proveable harassment that must have been to end up in court with a conviction )
So be careful with the initial little red flags - what can come across as “odd” behaviour or someone being “slightly” pushy/creepy which we overlook and think it’s a funny story for our mates or MN can escalate.