This isn't to start a fight but the shoe thing, if I can not slide I will put easy slide on my shoe regardless if someone likes it or not. Why is it ok for you to slide or plant and throw but i have to struggle if I am sticking on the approach. If I am having a problem sliding I am going to figure it out to solve the problem.
No one say's you can't use easy slide, just use it responsibly.
There are a lot bowler's who take easy slide and cake it all over the sole. then when they walk to and on the approach, you see easy slide foot prints every where.
Now someone else comes up to bowl they step in it and get it on their shoes, the approach is real slippery for them. They could fall. That's what the rule is about defacing the approach.
If you use it put it on outside the bowlers circle, tap the excessive off the on the carpet or use your shoe brush and brush it off. It will still work. It doesn't take much.
Or if your sticking on just one part of the sole , just put it on there, not the entire sole.