Never heard of that site before, but what an odd place it seems to be! The person who started the poll isn't really interested in having a discussion about the music, but seems to get off of the idea to break the site's record for lowest-scoring artist. The person with the David Bowie(!) profile picture sets the tone by saying: "Can’t see this leading to much fruitful discussion because I think everyone’s views will be pretty much the same."
A few people realize that their dislike of Morrissey might be somewhat irrational seeing that he hasn't actually done anything, unlike James Brown or Mark Kozelek, but try to justify their hatred by saying that Morrissey is openly problematic. At least other artists had the decency to sleep with underage girls, beat up their spouses or sexually harass women behind closed doors, but Morrissey wore a badge on the outside of his clothes!
Someone is worried that the website might get invaded by Morrissey fans: "If that did happen, would you be able to delete the votes/users that specifically came to defend him? Not saying you should, but would it be an option so the results aren’t skewered to the opposite of DiS’s general views?" Just imagine the chaos that would ensue if Morrissey would end up with a reasonably high rating!
Most of them sound like conformist bores who are terrified of differences of opinion, so instead of bringing some nuance to the discussion, they try to outdo each other in slandering Morrissey. The peer pressure is strong on that site! Fascinating!