Can you go around with LAHSO in effect?
There's always a risk with LAHSO and pilots can always say "unable"; student pilots are not even permitted to accept a LAHSO clearance. You can always go around if you deem it necessary; you're the pilot in control and empowered to make all decisions affecting the safety of your flight, and the fact that you're landing on a LAHSO clearance is just a factor you need to take into account. Making the decision to go around is, in my estimation, much safer than landing and potentially crossing the hold short line (due to the reaction time others have to deal with the situation).

While there is that risk, the tower is watching and at any sign of trouble they will call other landing aircraft off. The two runways aren't being landed on at the same moment such that normal operations would cause them to collide at the intersection if one didn't hold short.

According to this interesting article on the subject, there were 20 LAHSO incidents between 1994 and 1999.