Have you got stats, or a source for that? Even if it's true, it's still a bit of a skewed statement, considering the things you would've been jailed for "thinking" back then were more "Our King isn't very nice, is he?" or "Maybe the earth is round?" rather than racial slurs and bullying. Not that I agree with even arresting people for that most of the time, fwiw, it's just that it seems like the kind of easy, eye catching, contextless blurb a tabloid might print.
The Dapper Laughs thing may have seemed a bit excessive at the time, I agree (and I'm pretty sure I said so back then) but as you say, he wasn't arrested. He basically just had to come out and explain some nasty rape jokes. It was the national equivalent of your mum catching you saying something naughty. He wasn't forced onto Newsnight, either. Considering he's back doing exactly the same thing, I don't think it's affected him too much.