the best way to play at casinos is to not take the bonus, that way you are in control of the funds. The only exception to take is when the wagering reqirement is reasonable and the terms are conditions are favourable to both the player and the casino other wise i dont see any case to take the bonus.
It's rare when the wagering requirements for a bonus are favorable for the gambler, not just for the casino. Moreover, it's worth noting that beginners are likely to always be tempted by these deposit bonuses, as they simply don't read the requirements, which are written in small print.