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.......Just be aware that, strictly speaking, it's illegal to attach [suction-mounted] devices to wipe area......
So, in that case....99.9999% of every TomTom user is breaking the law? Some of the places that idiots put their GPS units is laughable. Many of them could be called a 'Heads Up display' since they are directly in their line of sight out the windscreen!
However, not to go off topic here we are talking about cameras. Since the enforcement of people chatting on mobile phones whilst driving is non existant and also not complying with having a hands free unit fitted (no, talking on your speaker phone on your mobile DOES NOT constitute Hands free) I wouldn't worry!