You know, we do not need that much security: just to keep most occasional hackers outside

OK, but good security is not more expensive than bad security. For the same price (often cheaper, in fact, being in development effort or in devices cost) you could obtain something that will really be a long-term deterrent, even for motivated attackers.

Moreover, relying on the current state-of-the-art will allow you to actually grade your resistance level: even repelling only "most people" might prove more difficult than it looks.

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