I wouldnt get so worried about exhausts popping, so keep your hair on !! Not everyone knows answers and are happy to read information by others and 300 people reading this thread is pretty minimal for the members here . It does depend on many factors on why an exhaust pops. usually caused by heat and unburnt fuel igniting in the system. If the engine is mapped in certain ways or even camshaft overlap is causing unburnt fuel to be cycled into the exhaust and exhaust heat causes igniton and causes pops. Using a cat , can keep the silencer cleaner from fuel deposits and so reduce the popping. By using ceramic coating or heat tape, can cause the heat to travel further from the head and manifold and into the silencer, thus causing an area to ignite and cause popping. As for damage, yes it can cause silencers to open up, but you'd have to have some really bad tuning to create that issue.