We have prayer beads because we pray a lot. Jesus often prayed all night. Paul taught to pray continuously. The Desert Fathers adopted prayer beads to help implement this command as early as the 200s AD. Last time I checked, there was no Scriptural prohibition against counting.
I see you're misinformed about the scapular as well. You must object to God's command in Deuteronomy 6:8, too, then.
You might want to research that a bit more.
Regarding Deut 6:8. You are way out of context on this one. You might want to reread that verse in context. To attempt to compare this with the belief that wearing a piece of cloth will save you is horrible exegesis. To be honest, I'm not sure what it is.
I just HATE it when folks are misinformed.
It is ALWAYS better to get it from the horses mouth; I always say...