Security holes / gaffes / auto login features ?

Users may be exposing themselves without realizing it.

Remember:
Several online dating sites HAD BEEN ALERTED IN ADVANCE, since 2009 about security holes, but they had not paid the attention it deserved. 
 New legislation can kill free/freemium sites.

The Online Dating Industry has no/weak Legislation, no ID verification, low reliable background checks, no Quality Norms.
No one compatibility matching method is Scientifically Proven.
BUT
A variety of new laws, or new interpretations of existing laws, could subject dating sites to claims or otherwise harm their business. (extracted from IAC SEC filing)

 Please read also:
Power Balance Bracelets lawsuit
Lawsuit against Match 
In January 2011 the former CEO for IAC Personals Latam Countries, Mr. Claudio Gandelman: Match Argentina recognized 75% inactive profiles.