Seth of sethsimonds.com explained why he kicked off Disqus off his blog:

3. I want solid spam filtering. Disqus has a lot of work to do to bring its filter up to Akismet’s level. I turned off “reactions” weeks ago (imported comments from FriendFeed, tweets, etc) because Disqus failed to give life only to legitimate remarks. I’m not the only one with spam issues. Disqus seems to have a lot of trouble keeping spam off their very own blog.

At first it appears Disqus is wonderful, until your blog becomes older, and some of your posts become popular. You are now officially a target for comment spammers. Here’s one example:

I posted about “Smart Bro’s HSDPA Dongle Designs for UAAP and NCAA”, and commentator posted like:

Thanks man, just what I was looking for. Worked like a charm Thanks so much…

Okay, so what’s the relevance in that? And the author link is pointing to some bogus website. By the way, I deleted the comment.

For newbies (at blogging), they’d naturally approve of that. What the heck, it’s a comment after all, a proof that his/her blog is alive. But consider the consequences. If you approve of that comment, his email address will be whitelisted at the comment system’s (in this case, Disqus) database. At the end, we the Disqus users will suffer.

Disqus, on the other hand, seems to add insult upon injury, introducing this and that features, which majority of users barely need. O c’mon, all I want is a reliable commenting system here at my Tumblr blog. I need not those eye-candies! Crap!

UPDATE: Hey look, this is exactly what I was talking about:

Now, you tell me, who needs that “real-time commenting, new sign-in integration or new upgrade interface”? I already liked the way it looked, and you’ll ruin it? Fix the spam comments problem, will you?

Ha! Lot of questions, lot of what-ifs! I wish Tumblr only has a full-proof commenting system, so I can get rid of Disqus altogether.