I used the bumper pads until the kids started standing where they could use them to climb out. I seriously doubt a baby that can move such as crawling and rolling over is going to keep his head forced into a bumper pad and suffocate. If they aren't safe then why do they continue to make them? Also the concern when my babies were little was having no blankets in the crib but my kids also had a blanket. I for one can't stand sleeping without a blanket on me so why would I require my baby to lay there cold without a blanket. It can be 80 degrees in my room and I will still use a sheet and comforter and don't like the fan on either so if hubby turns it on, I will cover my face with the blanket to block the air lol. I haven't suffocated yet.
2 of my kids also preferred sleeping on their belly. I would rather have them sleep through the night and be comfortable than force them to sleep on their back or side and not get any sleep because they aren't sleeping well and uncomfortable. All 3 of mine started sleeping through the night from age 6 weeks-2 months old. I did use a baby monitor and it picked up so well I could hear them breathing on a low volume setting so I would get up and check on them if I didn't hear them breathing or heard something different than their normal breathing especially when they had a cold and sometimes wheezing.
As for the new rules of not having cribs that the sides slide up and down. wow how crazy. I am so short I would not have been able to reach my baby and would have dropped the baby several times if I had not been able to put the side rail down to reach them. My arms are also short and no way I could reach the mattress with the sides up to even make the bed. Some of these safety cautions are totally insane. I would check and make sure the side rail was securely locked in place when I raised it back up and make sure the crib screws were tight so the crib didn't get wobbly. If people did the maintenance and kept the cribs secure those side rails would not be falling down on their own and if they did have that problem then buy a new crib because it is probably worn out anyway. My crib was used for 5 kids as my nieces also used it after my 3 kids were done with it and the crib was very safe and didn't ever have the side rail fall when it wasn't supposed to.