Sure, it's a convenient way to meet people you might normally not, but it's also a huge time-suck, especially if you use sites like Ok Cupid and Match, where you have to make and maintain a lengthy profile.
I can't even quantify how many hours per week I spend on Ok Cupid, answering match questions, browsing profiles, and messaging an array of men.
Though this isn't true for everyone, I know that I've been an inappropriate level of 'heartbroken' after things ended with someone I'd really only known for a few weeks, strictly because of the accelerated nature of the relationship.
It may seem like the two of you are on the path to love, but real intimacy takes tons of time and trust to build, so be cautious of falling for someone too quickly (as I have done on countless occasions).
The unfortunate (and unnecessary) stigma surrounding STIs mixed with the fast and often casual nature of online dating is not a good combination.
It can be exhausting to read through someone's profile and develop a crush on them, only to discover in their match questions that they think women who've slept with a lot of men are "sluts." Yuck.
OK, Catfish may be a popular TV show, but most people don't think this could ever actually happen to them IRL.