Is it acceptable for restaurants to take pre-orders for large tables?

Tables of twelve and more, you would think, would be welcomed with open arms by most restaurateurs BUT could you be wrong?

Larger tables take longer to arrive (there is ALWAYS someone who is late), longer to settle (obligatory air kissing) and longer to order (more obligatory “So how ARE you!?”).   They often order less, conscious of making the ‘split the bill’ fair for the self-centred; “Oh, just a starter for me!” - you know who you are!

Big tables stay for longer and some of them just don’t even turn up.

In short - smaller tables generate more revenue and can turn over twice.

So – is it acceptable for restaurants to ask for pre-orders and deposits or is it wrong to give customers admin for the sake of revenue for the restaurant and smoother service for the staff?