Better to buy Bitcoin-related items in-person at a conference than getting your physical address leaked as a bitcoiner because you ordered online though.

Depends. If you build in the space, then the builder-focused ones are great (like Baltic Honeybadger). If you are a business person looking to network, then others might be a better fit. One person's treasure is another person's trash.

how many btc conferences have you visited @DarthCoin ?