In a freeroll, it's important to treat it like any other MTT for a number of reasons:
- You need to play your game, your ranges, your betting styles and patterns
- You need to identify the players at your table and know what ranges they are capable of playing
- You need to be mindful of the structure to know how many hands you have until your BB goes down
You shouldn't be afraid of the bingos in a freeroll - you'll see them in many micro tournaments. The only difference is the loss of time versus the loss of your buy-in plus time. But these are great opportunities to practice your table routine and recognize when you have a situation that suits you long term. Some freerolls you may start with a table of donks who plow all in every hand - so what? If you're in the BB with AA are you folding to two all-ins? I doubt it.
But if you know that these two are both LAG to MANAIC who have already shown down 73o and 86s by plowing all in...why would you be scared by showing up with AA??
All that the freeroll implies is that ranges are wider and betting patterns may be different. All variables in how you approach and apply poker knowledge to your tables. It really isn't different - embrace the craziness, note the information offered to you and use that later in other tournaments if you run into some of the same players. It may come in handy.