Perhaps you could have this free little link space in your profile where you can link this dragcave thing or your own chatroom like here:
Aw, FH doesn't have spoilers...
well just pretend that was spoiled xD
but you'd have to type it in using HTML code?
So FH doesn't have to make a chat for every single profile, you could just have this open space on your profile where you can only link
1 thing like a chat or your dragcave account thing or those view counters or whateva
or maybe it only limits it to xat chat or tinychat or whatever chat plugin, sorry if I went off topic from the original idea, i was trying to make it work out.
but then again there will be people who post naughty stuff.
TL;DR - Basically how you can link HTML images on your DA account.