Why don't you waste your time doing that and see how helpful it is. I doubt they'll even reply and the info probably wouldn't be relevant or helpful. All they'll be able to give you at most is the email address or IP they signed up with and I dount they'll have used one that can be tied directly back to their ICO.
Because i do not have any authority to do so. Do you think that it would have same impact if a nobody asks them for details as compared to someone involved with the forum like the staff.
Also, if you have seen the way micro tasks websites operate, there are websites which contact them and get tasks related to their web property removed. Some websites are thus excluded on these micro jobs sites forever.