Question: Our advertising does not--and never has--treated all drugs equally.
We have, in the past, treated and advertised all drugs equally.

Answer: no

Question: especially if they're found guilty of the crime
Specifically, if they are found guilty.

Answer: yes

Question: Following the Act of Union with England in 1707, the castle lost its strategic importance but later, in Victorian times, experienced a rebirth.
The Act of Union with England was in 1707.

Answer:
yes