Please dont! Very very few scientists can use twitter for scientific discussions, they are interesting, technically capable, and are already there. Do not encourage scientists to slide down the road of self-promotion, as most people on twitter do.

I hate how much time academic institutions and PIs are investing in social media, curating facebook pages, twitter pages, a linked pages yadda yadda. It's mostly scientists chasing publicity so they can add another blog/newspaper article bullet to their CV so they can get more funding. I sincerely hope funding bodies start banning those publicity bullet points from CVs during evaluations.