Cons
1. You never know who is behind the profile- Sad to say, but some people find enjoyment out of deceiving others, so users need to be wary.
2. Missing out in the traditional dating process- Classic scenarios of meeting someone, going out and connecting with him or her in real life are altered or voided.
3. Disapproval- Chances are that family and friends will see your online relationship as something “not real” because of its cyber context. Not everyone understands the appeal.
4. It can be addictive- For some, finding a date or spending time with their partner may mean many hours spent online, away from the actual-world.
5. Costly- If you are not using free dating websites/apps, it can be pricy to maintain a membership
6. 40 million singles in the U.S. alone have tried online dating- There are so many people in the cyber-world that sorting through potential candidates and interests can be a daunting and tiring process.
Sources:
http://allwomenstalk.com/12-pros-and-cons-of-online-dating/14/
http://www.huffingtonpost.com/julie-spira/online-dating-vs-offline-_b_4037867.html