Lots of people alias rm to rm -i for the sake of safety. Another thing that helps is not typing rm -rf ./files and instead typing rm -rf files. The ./ prefix is easily mistyped, and can lead to any of the following scenarios:

• rm -rf . / files
• rm -rf ./ files
• rm -rf . /files
• rm -rf ./files

The 1st one will wipe your current directory and then try to wipe the whole computer. The next 2 wipe your current directory. Only the last one does what you want.

So why risk it? Don’t type ./. It doesn’t make the command less ambiguous anyway.