Is there a way to keep repeat link spammers from a free and open art community project without requiring membership/passwords or the like?
I have been participating in a weekly, online art challenge called Illustration Friday
for a few months now. It was started several years ago and has hundreds of participants. To enter, you post your entry on your blog or wherever, then go to the IF site and put in your name, link to your post and a thumbnail. (If you do art it is awesome for inspiration.)
Spammers are common but usually not too bad, until last week. I can't even imagine it actually helps with their Google ranking or whatever it is they are trying to accomplish by including a link to their crap, but one particular guy put 5 links two weeks ago, and this past week a total of 16. I don't run the site but I have been helping by alerting the owners and when they have time, they go in and delete the offenders. (I have a feeling it is one of several projects for the owners so they don't always check.) Is there any way, aside from making people sign up or something, to at least keep repeat offenders away?
Here is a link to the last challenge
where you can see the spammers six listings near the top (posted after the first 10 were deleted). He doesn't even bother to change his name or anything and it looks like it is links to his resume or resume service or some other crap.
I realize it's not my blog or my project, I just thought if there was a way to minimize this (infuriating annoyance) I could let the owners know. I'd also like to know in case I decide to start a similar project in the future. [I have offered to help by monitoring and deleting them myself, which they said they might do at some point in the future, but for now they prefer not to give a stranger access - which is totally understandable.]