Thanks a lot for your reply, MarkM!

Nowadays, it is indeed very easy to create your own altcoin, but as you also suggest, one does need one or more dedicated developers to keep the software secure and up-to-date. For a small community, it would be great though to be able to create their own altcoin on a bigger blockchain, maintained by a bigger group of developers, on which not only that specific altcoin is running, but through which everyone is able to run their own coin. It will not be the technologically most advanced coin, but at least it could be decent, solid and your own coin could grow on it, without having to be dependent of another coin, like Bitcoin (or another altcoin), basically because of technical reasons (dust). To put it very simply, you don't want your community coin users to have to worry about yet another cryptocoin, even if it's Bitcoin. Of course, thinking out loud, one could just define their "altcoin" unit to be equal to 1/10, 1/100, 1/12345, ... BTC. Then, only your front-end applications need to change, but you would still be working in Bitcoin underneath. Does this make any sense?