a person who is present at an event or incident but does not take part.

reprimand or scold someone.

I think I'd be too..

In that type of situation it'd be...(three adjectives)

pretend not to notice.

meet or find someone or something by chance.

I'm not sure that would be the best...

a small retail business that stocks a range of everyday items such as snack foods, soft drinks, groceries, confectionery, tobacco products, over-the-counter drugs, toiletries, newspapers, and magazines.

to drop rubbish on the ground in a public place

a person who steals another person's property, especially by stealth and without using force or threat of violence.

seek to harm, intimidate, or coerce (someone perceived as vulnerable).