PP, Is this normal ?

[Dice Man]

I've just started playing the $11 speeds and i'm getting these pop-ups (forgot what they are called) where i have to type in the displayed numbers in order to continue playing. Obviously done in order to prove i'm physically playing and not a bot. Been getting several per session - very annoying when your multi-tabling and have a few bubble situations going.

I use party sng helper/poker office and only use the XP virtual keyboard now and then, so i could see how they my be suspicious.

Is this standard ?