I have a day job, so I don't play during working hours. Even if I didn't have a day job, I think I would refrain. Here's a small example of why:
This is the SharkScope dump of a $33+$3 tournament that started at about 12:30 PM PDT today. There are 4 players with positive ROIs and 1000+ tournaments of experience, and one of those has a 20% ROI. Two out of the three negative ROI players have too small a sample size to be significant, and one of the players at the table is a fish.
If I've learned anything as I've improved it's to recognize when it's best wait for a better opportunity.