Less easy, more "registering on a porn website" sort of worries, perhaps.
And then you get in the whole passive aggressive business like w
e saw earlier, "you post contact details." "no, you post contact details."
"I- I don't want to play with someone who sounds bossy!"
"I wasn't trying to be bossy, I was just not wanting to give out information on fourchan, not, not scare you-!"
"But.. I made a fool of myself... How can Iever face you now?!"
"No... No, I was the fool... But it is too late, much too late for these recriminations... Now both of us will return to our beds and cry into our sheets, our love forever unfulfilled..."
IRC allows you to avoid posting any personalised information here on 4chan itself, which is drilled into a lot of folks especially with the archives saving everything. Maybe they don't want to throw away f-list chars and also not posttem on 4chan. Not everyone is as confident at having their sexuality on display.