I know that with most rack systems the lids for the tubs are left off to help with airflow and humidity, my question is does it really matter if you leave the lid on? I'm currently in the process of building a rack that is 5 shelves high and can hold 3 tubs per shelf. I still live at home with Mom & Dad, and while they support my snake hobby, as long as they are in a secure enclosure and can't get out (happened once, Mom almost had a heart attack, she found it before I did...), I don't want to take that chance of having a tub slightly askew and having someone getting out. So my question, for added security can the lids stay on? I am using the 32 quart by sterilite, the ones with purple handles. I'm planning on drilling holes in the tubs themselves to help with airflow and humidity, if I drill holes into the lid (many many holes) would that suffice and work as if the lid was off?