Not 10. Not 5. There's only 1 sign you spend too much time on Twitter.

So, in a lazy attempt to score some laughs, David Letterman has described his Top 10 signs you spend too much time on Twitter.

It’s easy to knock something, take the ‘anti’ side and write some cheap, controversial headlines. There’s been quite a lot of this happening within the Twitter community itself lately, so it’s easy to see why a celebrity comedian would jump on board.

I, however, think that there is only ONE sign you’ve been spending too much time on Twitter and I’d like to share it with you now. Unfortunately it’s more than 140 characters, but it’s not always possible to appreciate something from just a single Tweet.

The ONLY sign that you spend too much time on Twitter is:

You find yourself engaging, and sometimes meeting face-to-face, with an ever increasing number of new and interesting people who freely provide knowledge, support and a seemingly limitless capacity for kindness.