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If he was accessing the internet through your (or anyone else’s) wireless network, regardless of whether its secured or not he’s committing an offence under the connomicatiums act. A bit difficult to prosecute but it can still be done, especially if as you ay there may be other offences being committed.On the plus side its unlikely they’d be interested in trying to get access your own data.
GOURMETMORSAN 
If he was accessing the internet through your (or anyone else’s) wireless network, regardless of whether its secured or not he’s committing an offence under the connomicatiums act. A bit difficult to prosecute but it can still be done, especially if as you ay there may be other offences being committed.On the plus side its unlikely they’d be interested in trying to get access your own data.