To drive out foreign influences, the main thing the boxers did was to

They attack foreigners and burned down missionaries.  With the support of the Empress Dowager, they stormed the foreign legations for 55 days.  The foreigners did their best to defend themselves against the boxers.  An international army composed of British, American, Russian, Japanese, French, German, Italian and other foreign forces liberated the legation and drove the boxers out.  The boxers were later executed for their acts.

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.

sorry i cant