David,
No, you don't need to accept everything that you were told, but it
will benefit you greatly to listen humbly and apply those advises
that are tried and benefical to you.
what is fundamentally wrong is this
1) The word "Lord" though is an English word is a very generalised
word, what a non-christian means and what a christian means when
using this word may very well be different, hence the part about
not using the Lord's name in vain don't really holds water.
2) "wtf" on the other hand is a swear word, be it from a christian
or non-christian, and cursing and swearing is definitely
discouraged.
