I wanna bubble wrap my kids forever

So that they don't have to face creepy people at the bus stop like I just did this morning. Weird man was spitting every few mins. Looked weird. He probably can't help it. But what if he decides to spit at people? What if my daughters had to take buses themselves next time? And weird people spat at them because they are mentally unsound? Argh. 

When I was in sec school or JC, I once sat in a bus on my way home where a man sat next to me on the aisle seat and he started snorting/laughing away by himself. Then he started rubbing something on his lap. I assumed he was rubbing his finger. Another passenger got up and saw what he was doing, paused, stared, and left. Then I realized it was probably not his finger. Argh. I was trapped at the window seat, and dared not move or change seat. What if he turned violent or touched me? I quickly left when the bus reached my bus stop. I didn't look at his lap.

So. Next time my kids will have to take public transport to go to sec sch. MRT means potential molestors who grab the chance to squeeze near you in the crowded peak hour train. Bus also same thing. I told hubby once that the 4 kids should learn stuff like taekwando at the neighborhood CC to help with some self defense confidence. He said no use leh. I see how. So far I only see 2 options. Taekwando or bubble wrap. Amazon does sell bubble wrap, right?