From staff: "we don't limit the number of rooms you can create. When you create a room we just allocate a few static data structures (file-like database rows) so the physical limit would be our data repository size. Note that if you create thousands of rooms you'll have a very hard time trying to manage them via DevPortal and/or service API (all rooms for the account are kept in a single "folder" so listing that folder will be a very slow operation) but you can keep the list in your database."
the problem is there should be a "Search this Forum" not "Search all Forums". if you want to search in LCCS only you need find out where and how, which is not very userfriendly.
People end up using "Search all Forums" and dont find related hits. Only few people would dig through the options - only nerds like me ;)))