Match Group, which owns Tinder, OKCupid, PlentyofFish and other prominent online dating sites, has been engaged in litigation on multiple fronts lately, showing that just because a company is in the business of helping users find love, doesn’t mean its behavior toward competitors will be at all affectionate.

So, Match’s newest rival in the online dating market, Facebook Inc., might want to have its in-house lawyers review Match’s recent intellectual property lawsuits if the company wants to avoid the potential for litigation in its latest venture.