Evaluating of Kirill's idea

First of all I'd like to explain his idea
because as I know a lot of people didn't
understand what it is about.
As we everybody know when we go to
the cafe or restaurant we should pay some
amount of money to waiters (usually it
is 10% of the bill) for their service.
Sometimes in some restaurants service
is not good enough. So we don't want to pay
for service because we don't enjoy it but we don't
have any choice because the bill is include
money for service. In this situation customers
start to feel presure and disappointment as
Kirill does in "Dong Dong" cafe.
So the main idea is to do not make any pressure
to customers and to take money from them by
another way. Kirill counted that in local pubs
and restaurants waiters and barmens gets
approximately 1.5 pounds for service per each
customer. In restaurants or in pubs on the tables
should be some kind of slogans where it will be
written: `We are happy to see your gratitude
for our service that you will leave on the table`.

I think that the main strengths of this idea is that
customers don't feel any pressure. They can decide
by theiselves if they want to pay for service or not.
Weakness of this idea is that some customers
may not like service so therefore they will not pay
for it. Restaurants should have qualified staff who
will be nice and kind with customers so maybe
restaurants should train staffs or motivate them.