--enable-memory-limit should be vital/interesting for every medium to large installation. Perhaps a private USE-flag would suffice, but I'd prefer it to be the default. The actual limits are configurable by editing the php.ini, if someone likes to use/build php-scripts that consume looots of memory. Reproducible: Always Steps to Reproduce:
working this into php.eclass tonight
Fixed in the eclass using a local USE flag 'phpmemlimit'.