Strict Bankroll Management is very important and should be followed.
That being said, I believe that if your Bank Roll management is telling you that you can only afford the minimum buy in at a table, you are playing stakes too high.
You should be basing your Management on the Table Buy in, which is usually 100x the BB, (Unless it's a Deep Stack Table). So if you use a simple system like 20 buy ins and have $500, you should not be playing above $.10/.25 Tables.
If you can only buy in for the minimum, you will most likely be playing above your head. It will be tough to make any money for a number of reasons as well.
If you double your initial buy in, you only go to $4, so it'll take longer to get good return on your big hands.
Second, if you don't have a lot in front of you, it will be tough to get paid off because you might not get action due to the small amount the other players have to make off of you. It's easier to keep you small stacked and pick you off when they pick up a big hand. I know I don't play with small stacks unless I have a big hand...it's not worth it.
Here's a decent site that calculates where you should be playing based on your bankroll and gives some decent advice as well.
Just my Thoughts....