I believe you may be thinking of the Day of the Triffids. This scary venture dealt with an outbreak of alien plant life that among other things was causing rampant and apparently incurable Blindness in the British Capital. I did not see the picture, cannot offer any further comments.
man killing people
The title of that movie is "Law Abiding Citizen."
exorcist
A movie grip are people that are used for their physical strength in setting up the construction for a movie or theater. Examples of a movie grip's job is setting up the lights and moving props.
It's implied in the film that the Earth is defending itself from humanity by having plants secrete whatever makes people commit suicide.
man killing people
My guess would be 'In Time'. A movie where people have a set amount of time to live, and killing people and stealing it would give you more time.
Creepshow 2.
The title of that movie is "Law Abiding Citizen."
Untraceable.
Untraceable
Halloween
exorcist
Untraceable
Brotherhood of the Wolf
coz there a set of erse wipes
Resurrection