Do what you want. I'm just passing along some information.
There are reports going around that certain plastics, such as those used to make plastic wrap and food storage bags, will give up carcinogenic compounds when heated in contact with food. Now taken on their own, you may not give too much creedence to such reports. However, when the manufacturers of these products tell you not to do this or that the plastic has to be at least an inch away from any food contact, it tends to suggest there is some truth to the reports.
It's up to you.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan