We always said to not tap to chokes, just keep fighting and pass out if it happens, because some guys panic and think they are going out and you usually have a little more time to fight it and might escape
One time this guy tapped out to Frank from a rear naked choke pretty quick, Frank turned him around and slapped him in the face and said 'Dont tap to that ever again' or soemthing like that
Chokes are actually pretty safe, for years guys have been passing out in Judo, Jiu Jitsu, Sambo, MMA, etc..comps for years
Joint locks are a different story, you should tap because you can really get hurt