Being as silent as possible has only two effects; an attacker takes 2 seconds longer and you significantly degrade the network experience of all your users. It hasn't been best-practise in a while (outside the greybeard firewall admin circles), ie, almost a decade at this point. Anyone who hasn't figured that out should really consider not doing network admin if their knowledge is a decade out of date.

Hmm, OK. Might be that my knowledge was not really up-to-date there. I'd really appreciate if network protocols designed for common benefit (such as ICMP) are not discouraged due to security for a change. In this case, sorry for spreading FUD, that wasn't my intention.